Year	years
1960	71.69
1961	72.48
1962	71.89
1963	72.06
1964	73.18
1965	73.04
1966	73.82
1967	73.83
1968	73.72
1969	73.88
1970	74.55
1971	74.88
1972	75.21
1973	75.12
1974	75.91
1975	75.91
1976	76.27
1977	76.74
1978	77.13
1979	77.46
1980	77.38
1981	77.76
1982	78.19
1983	77.99
1984	78.77
1985	78.8
1986	79.1
1987	79.6
1988	79.7
1989	80.2
1990	80.3
1991	80.4
1992	80.8
1993	81
1994	81.2
1995	81.5
1996	81.8
1997	82
1998	82.1
1999	82.6
2000	82.8
2001	83.2
2002	83.2
2003	82.8
2004	83.7
2005	83.6
2006	84.1
2007	84.2
2008	84.2
2009	84.3
2010	84.7
2011	84.8
2012	84.8
2013	85.2
2014	85.6
2015	84.9
2016	85.6
2017	85.2
2018	85.6
2019	85.7
2020	84.5
2021	84.9
2022	85